The **H55-R** typically refers to a specific variation of the Intel H55 chipset motherboard, often produced by manufacturers like ASUS, Gigabyte, or various OEM brands. This motherboard is designed for the **LGA 1156 socket**, supporting the first generation of Intel Core i3, i5, and i7 processors. Below is a breakdown of the electronic components and technical specifications. --- ### 1. Core Architecture & Chipset The H55 chipset was a "Platform Controller Hub" (PCH). Unlike older chipsets, it moved the memory controller and graphics interface directly onto the CPU. | Component | Description | | :--- | :--- | | **Socket** | LGA 1156 (Socket H) | | **PCH** | Intel BD82H55 PCH | | **Bus Type** | DMI (Direct Media Interface) connecting CPU and PCH | | **Lithography** | 65nm process technology | --- ### 2. Main Electronic Modules The motherboard consists of several critical subsystems: #### A. Power Delivery (VRM) The **Voltage Regulator Module (VRM)** converts the 12V power from the PSU into the low voltage (approx. 1V-1.5V) required by the CPU. * **MOSFETs:** Act as high-speed switches. * **Chokes/Inductors:** Ferrite core components that smooth the current. * **Capacitors:** Usually Solid Capacitors (on -R variants) to filter noise and stabilize voltage. #### B. Memory Architecture * **Type:** DDR3 Dual-Channel. * **Slots:** Usually 2 or 4 DIMM slots. * **Voltage:** 1.5V standard, though some XMP profiles allow for higher. #### C. Expansion & Connectivity * **PCI-Express:** 1 x PCIe 2.0 x16 slot for discrete graphics cards. * **Storage:** Integrated SATA 3Gb/s controllers (usually 4 to 6 ports). * **I/O Controller:** Typically a Winbond or ITE Super I/O chip managing the keyboard, mouse, and monitoring temperatures/fan speeds. --- ### 3. Integrated Circuits (ICs) & Ports Modern (at the time) H55-R boards utilized several specific ICs: | Category | Typical Electronic Part | | :--- | :--- | | **Audio Codec** | Realtek ALC887 or ALC892 (High Definition Audio) | | **Ethernet** | Realtek RTL8111 series (Gigabit LAN) | | **BIOS Chip** | SPI Flash Memory (8Mb or 16Mb) | | **USB Support** | Integrated USB 2.0 (up to 12 ports) | --- ### 4. Technical Comparison: H55 vs. Others The "-R" suffix often denotes "Retail," "Revised," or "RAID" capabilities depending on the specific manufacturer (e.g., ASUS P7H55-M). | Feature | Specification | | :--- | :--- | | **Max TDP** | 95W (Supports high-end i7-800 series) | | **FDI Support** | Yes (Flexible Display Interface for integrated graphics) | | **Overclocking** | Limited (Limited BCLK adjustment compared to P55) | --- ### Summary of the "H55-R" Significance If you are looking at a board specifically labeled **H55-R**, it is likely a budget-to-midrange legacy board. Its primary electronic value today is in maintaining older server systems or light office PCs using **Nehalem** or **Westmere** architecture CPUs.